Photoluminescence and photothermal effect of Fe{sub 3}O{sub 4} nanoparticles for medical imaging and therapy
- The Materials Science and Engineering Program, Department of Mechanical and Materials Engineering, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, Ohio 45221 (United States)
- Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94305-2115 (United States)
- Med-X Institute, Shanghai Jiao Tong University, Shanghai 200030 (China)
- James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, Ohio 45267 (United States)
Photoluminescence (PL) of Fe{sub 3}O{sub 4} nanoparticle was observed from the visible to near-infrared (NIR) range by laser irradiation at 407 nm. PL spectra of ∼10 nm diameter Fe{sub 3}O{sub 4} nanoparticles organized in different spatial configuration, showed characteristic emissions with a major peak near 560 nm, and two weak peaks near 690 nm and 840 nm. Different band gap energies were determined for these Fe{sub 3}O{sub 4} nanoparticle samples corresponding to, respectively, the electron band structures of the octahedral site (2.2 eV) and the tetrahedral site (0.9 eV). Photothermal effect of Fe{sub 3}O{sub 4} nanoparticles was found to be associated with the photoluminescence emissions in the NIR range. Also discussed is the mechanism responsible for the photothermal effect of Fe{sub 3}O{sub 4} nanoparticles in medical therapy.
- OSTI ID:
- 22311014
- Journal Information:
- Applied Physics Letters, Vol. 105, Issue 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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